• Mark A Cairns, Peter T Moskal, Scott M Eskildsen, Robert F Ostrum, and R Carter Clement.
• Department of Orthopaedics, University of North Carolina Health Care, Durham, North Carolina.
• J Arthroplasty. 2018 Sep 1; 33 (9): 2722-2727.

BackgroundBundled payments are meant to reduce costs and improve quality of care. Without adequate risk adjustment, bundling may be inequitable to providers and restrict access for certain patients. This study examines patient factors that could improve risk stratification for the Comprehensive Care for Joint Replacement (CJR) bundled-payment program.MethodsNinety-five thousand twenty-four patients meeting the CJR criteria were retrospectively reviewed using administrative Medicare data. Multivariable regression was used to identify associations between patient factors and traditional (fee-for-service) Medicare reimbursement over the bundle period.ResultsAverage reimbursement was $18,786 ± $12,386. Older age, male gender, cases performed for hip fractures, and most comorbidities were associated with higher reimbursement (P < .05), except dementia (lower reimbursement; P < .01). Stratification incorporating these factors displayed greater accuracy than the current CJR risk adjustment methods (R2 = 0.23 vs 0.17).ConclusionMore robust risk stratification could provide more equitable reimbursement in the CJR program.Level Of EvidenceLarge database analysis; Level III.Copyright © 2018 Elsevier Inc. All rights reserved.

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